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Studio William Hefner

Based in Los Angeles, Studio William Hefner crafts high-end residential living and dining spaces defined by precise axial alignments, concealed ceiling slots, and louvered screens that filter natural light over neutral timber and stone. The portfolio serves as a strong reference when detailing double-height living halls, specifying integrated millwork along glazed perimeters, or aligning architectural lighting with interior axes.

Double-height living room with grand piano and mezzanine staircase by Studio William Hefner.

Hollywood Hills Revisited

A grand double-height living room precedent that integrates a sculptural mezzanine stair, generous glazing, and layered conversational seating for a luxurious residential interior.

What we like about this project
A sleek arched floor lamp echoes the curve of the grand piano tucked beneath the open stair.

Materials

  • wood
  • glass
  • steel
  • fabric
  • plaster

Visual identifiers

  • double-height-ceiling
  • mezzanine-staircase
  • grand-piano
  • clerestory-windows
  • floor-to-ceiling-glass

Style tags

  • contemporary
  • luxury
  • modern-residential

Visual tags

  • luxurious
  • open-plan
  • natural-light
  • residential
  • contemporary
Geometry
Expansive double-height volume featuring a central floating staircase that bisects the rear wall, flanked by expansive glass sliding doors on one side and layered seating arrangements below.
Structural guess
Steel and concrete framing supporting wide-span double-height volumes and mezzanine floor slabs.
Spatial scale
Generous double-height scale with a grand sense of verticality, balanced by human-scaled furniture arrangements.
Lighting
Abundant natural daylight floods through floor-to-ceiling glass and upper clerestory windows, casting soft reflections across the polished floors and white walls.
Atmosphere
Bright, airy, and sophisticated with a harmonious balance of warm wood tones and clean white surfaces.
Environmental context
Bright exterior hillside visible through large glass openings, suggesting a warm, sunny climate.
Spatial experience
Grand and voluminous yet grounded by intimate seating groupings and warm, natural materiality.
Composition rhythm
Symmetrical foreground seating groupings anchored by horizontal lines leading the eye toward the sculptural staircase and piano.
Style reading
Contemporary luxury residential interior
Program
Luxury residential living hall
Perspective
Interior Spatial
Discipline
interior
Materials
wood, glass, steel, fabric, plaster
Visual identifiers
double-height-ceiling, mezzanine-staircase, grand-piano, clerestory-windows, floor-to-ceiling-glass
Style tags
contemporary, luxury, modern-residential
Visual tags
luxurious, open-plan, natural-light, residential, contemporary
Geometry
Expansive double-height volume featuring a central floating staircase that bisects the rear wall, flanked by expansive glass sliding doors on one side and layered seating arrangements below.
Structural guess
Steel and concrete framing supporting wide-span double-height volumes and mezzanine floor slabs.
Spatial scale
Generous double-height scale with a grand sense of verticality, balanced by human-scaled furniture arrangements.
Lighting
Abundant natural daylight floods through floor-to-ceiling glass and upper clerestory windows, casting soft reflections across the polished floors and white walls.
Atmosphere
Bright, airy, and sophisticated with a harmonious balance of warm wood tones and clean white surfaces.
Environmental context
Bright exterior hillside visible through large glass openings, suggesting a warm, sunny climate.
Spatial experience
Grand and voluminous yet grounded by intimate seating groupings and warm, natural materiality.
Composition rhythm
Symmetrical foreground seating groupings anchored by horizontal lines leading the eye toward the sculptural staircase and piano.
Style reading
Contemporary luxury residential interior
Program
Luxury residential living hall
Perspective
Interior Spatial
Discipline
interior

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  • © 2026 HappyCluster

Directories

  • Firms
  • Patterns

AI Native Apps

  • AI Mode Search
  • SoftMarket
  • 2nd Brain

About HappyCluster

  • About
  • How it works
  • Contact

Connect

  • Waitlist
  • X
  • GitHub

Legal

  • Privacy
  • Terms

HappyCluster

© 2026

Double-height living room with grand piano and mezzanine staircase by Studio William Hefner.

Hollywood Hills Revisited

A grand double-height living room precedent that integrates a sculptural mezzanine stair, generous glazing, and layered conversational seating for a luxurious residential interior.

What we like about this project
A sleek arched floor lamp echoes the curve of the grand piano tucked beneath the open stair.

Materials

  • wood
  • glass
  • steel
  • fabric
  • plaster

Visual identifiers

  • double-height-ceiling
  • mezzanine-staircase
  • grand-piano
  • clerestory-windows
  • floor-to-ceiling-glass

Style tags

  • contemporary
  • luxury
  • modern-residential

Visual tags

  • luxurious
  • open-plan
  • natural-light
  • residential
  • contemporary
Geometry
Expansive double-height volume featuring a central floating staircase that bisects the rear wall, flanked by expansive glass sliding doors on one side and layered seating arrangements below.
Structural guess
Steel and concrete framing supporting wide-span double-height volumes and mezzanine floor slabs.
Spatial scale
Generous double-height scale with a grand sense of verticality, balanced by human-scaled furniture arrangements.
Lighting
Abundant natural daylight floods through floor-to-ceiling glass and upper clerestory windows, casting soft reflections across the polished floors and white walls.
Atmosphere
Bright, airy, and sophisticated with a harmonious balance of warm wood tones and clean white surfaces.
Environmental context
Bright exterior hillside visible through large glass openings, suggesting a warm, sunny climate.
Spatial experience
Grand and voluminous yet grounded by intimate seating groupings and warm, natural materiality.
Composition rhythm
Symmetrical foreground seating groupings anchored by horizontal lines leading the eye toward the sculptural staircase and piano.
Style reading
Contemporary luxury residential interior
Program
Luxury residential living hall
Perspective
Interior Spatial
Discipline
interior
Materials
wood, glass, steel, fabric, plaster
Visual identifiers
double-height-ceiling, mezzanine-staircase, grand-piano, clerestory-windows, floor-to-ceiling-glass
Style tags
contemporary, luxury, modern-residential
Visual tags
luxurious, open-plan, natural-light, residential, contemporary
Geometry
Expansive double-height volume featuring a central floating staircase that bisects the rear wall, flanked by expansive glass sliding doors on one side and layered seating arrangements below.
Structural guess
Steel and concrete framing supporting wide-span double-height volumes and mezzanine floor slabs.
Spatial scale
Generous double-height scale with a grand sense of verticality, balanced by human-scaled furniture arrangements.
Lighting
Abundant natural daylight floods through floor-to-ceiling glass and upper clerestory windows, casting soft reflections across the polished floors and white walls.
Atmosphere
Bright, airy, and sophisticated with a harmonious balance of warm wood tones and clean white surfaces.
Environmental context
Bright exterior hillside visible through large glass openings, suggesting a warm, sunny climate.
Spatial experience
Grand and voluminous yet grounded by intimate seating groupings and warm, natural materiality.
Composition rhythm
Symmetrical foreground seating groupings anchored by horizontal lines leading the eye toward the sculptural staircase and piano.
Style reading
Contemporary luxury residential interior
Program
Luxury residential living hall
Perspective
Interior Spatial
Discipline
interior

Related in this portfolio